Adding support of LightingZDMA as a target (2 Thunderbolt 3 ports) LiteX board

[ohault]

This device comes with two Artix7 FPGAs and two Thunderbolt 3 capable ports !
One of the FPGA would contain proprietary IPs
See https://github.com/ufrisk/pcileech-fpga/blob/master/ZDMA/readme.md

[enjoy-digital]

Thanks @ohault, we don't currently have this hardware but if you manage to get/provide some, we could probably put in place initial LiteX-Boards support.